Intermittent temple thread cutter



ly J. E. REPAs's 2,353,077

INTERMITTENT TEMPLE THREAD CUTTER Filed Sept. 7, 1942 g Sheets-Sheet 1 INVENTOR. JAMES E. EEPA 66,

BY" I g? g y J. E. REPAss 2,353,077

I INTERMITTENT TEMPLE THREAD CUTTER Filed Sept. 7, 1942 2 Sheets-Sheet 2 INVENTOR. JAMES E. EEFAS 5.

' A770 ENE).

Patented July 4, 1944 INTERMITTENT TEMPLE THREAD oUTTEa James E. Repass, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application September 7, 1942, Serial No. 457,590

7 Claims.

This invention relates to a. temple thread cutter for a filling replenishing loom, and more particularly to a means for producing controlled intermittent operation in such a device.

Temple thread cutters are employed on filling replenishing looms to trim, at the selvage, the filling ends formed in conjunction with the filling replenishing operation. The temple thread cutters in common use are principally of the continuously operated type, although various forms have been proposed which will operate intermittently. Such prior devices have not proven commercially successful nor practically acceptable because they were too expensive to construct or not dependable in operation.

It is an object of this invention to provide an intermittently operated temple thread cutter which will be simple in construction and compact in form, and which can be adapted to modify existing types of continuously operated temple thread cutters to convert them to intermittently operated devices.

It is a further object of this invention to provide a self contained selvage trimming device which will comprise a means actuated by the presence of a filling end to make the cutter blade operative, and in which the cutter blade will be restrained in a stationary position when no filling end is present.

These and other objects of the invention may be accomplished by the construction illustrated in the accompanying drawings, which are presented as a preferred embodiment of my invention, although it will be understood that I do not wish to be limited, although it will be understood that I do not wish to be limited to the specific structural details, disclosed therein, but wish to be free to use all mechanical equivalents thereof within the scope of the appended claims, and in which:

Fig. 1 represents a plan view of a portion of the magazine side of a filling replenishing loo-m of conventional design and shows a temple thread cutter embodying the features of m invention in place thereon.

Fig. 2 represents an elevational view in perspective of the temple thread cutter embodying my invention, and shows the disposition of the parts when held in an inoperative position.

Fig. 3 represents the same View Of the temple thread cutter as shown in Fig. 2, but shows the parts released from the inoperative position.

Fig. 4 represents an elevational view of the temple thread cutter approximately as seen from the-direction 4-4 of Fig. 1.

Fig. 5 represents an elevational view Of the side of the temple thread cutter, as seen from the direction 5-5 of Fig. 1, with the parts restrained in an inoperative position.

Fig. 6 represents a detail of a portion of the temple thread cutter, and will be described more fully in the following specifications.

The fragmentary portions of the loom shown comprise a breast beam I to which is affixed a magazine 2 for reserve filling carriers. A lay 3 is constructed to reciprocate toward and away from the breast beam. On the lay is secured a. shuttle box 4 in a position to trap a shuttle 5- and place it under the magazine, when the lay' reciprocates forwardly, to receive a replenished filling carrier as needed. Subsequently, the lay reciprocates rearwardly and the shuttle is picked throughthe shed 0f warp threads, W.

When it becomes necessar to replenish the filling carrier presently in the shuttle, a feeler mechanism initiates operation of the transferring mechanism 5 to perform the transfer. Before this is accomplished a thread parter l is made to approach the shuttle to part and clamp the filling end F-l from the outgoing filling carrier and draw it forwardly of the loom.

When the transfer has been perfected and the shuttle is travelling on the first pick thereafter, a second filling end F2 is formed leading from the thread holder on the magazine to the salvage S. On subsequent picks the filling thread F3 is distributed through the shed and beaten into the fell.

A temple assembly, generally indicated at 8, is secured in a position adjacent the selvage to hold the woven fabric in extended position. A thread cutter may be combined with the temple to severthe filling ends F-! and F--2 at the selvage so they may be cleared from the loom.

All of theforegoing procedure is well known in the Weaving art and hence an extended explanation of the process is not thought to be necessary here.

Affixed to a stationary part of the loom and in a position to clear the top of the lay and the inner end of the front box plate 9 is a thread holder I0. When the filling ends Fl and F2 are formed they will lie across the path taken by the box plate as it reciprocates with the lay. As the lay approaches the front of the loom, hornlike projections I! and I2 formed on the box plate will engage the fillin ends and carry them forwardly also. The filling ends will thus both be brought into contact with the thread holder Ill which will hold them in a, forward position.

In this position the filling ends will be brought to bear against the rearmost face of the temple thread cutter and held within the range of action of the cutting mechanism.

The temple assembly comprises a temple bar l3 to the rearmost end of which is attached the temple head 54, containing the usual temple roll arrangement l5 and a support It for the temple thread cutter. Attached to, and extending below the temple, approximately at the point of juncture of the temple bar and the temple head, is a flange H which is positioned to lie across the path of the lay as it approches its most forwardly position.

The temple bar is resiliently supported on the breast beam of the loom for reciprocal movement forwardly and rearwardly relative thereto in a manner not shown herein but well known in the art. The lay engages the flange I? on a forward beat and moves the temple assembly forwardly as a unit against a compression spring not shown, connected to the temple bar. The spring returns the temple to its original position when the lay beats back.

There is a passage l8 formed in the support iii to accommodate the cutter blade IQ for sliding and rocking movement. The cutter blade is of usual form at its rearward end having a nose of somewhat L shaped formation on one side of which, and facing forwardly, is a cutting edge 28. A ledger blade 2| is secured to the adjacent side of the passage l8. The cutting edge and the ledger blade 2| cooperate to perform the cutting operation on the filling ends.

On the opposite side of the passage I5 is placed a plate 22 which bears against the side of the cutter blade. The pressure of th plate 22 on the blade can be adjusted by means of a screw 23 to control the pressure between the cutting edge 26 and the ledger blade. The friction produced by this adjustment acts to retard the free motion of the cutter blade in the passage IS.

The forward end of the cutter blade is constructed with a depending heel portion 24 projecting into the path of the lay.

A pin 25 projects from the temple bar at a point approximately in vertical alignment with the heel of the cutter blade, and it is co-extensive with the lateral direction of the support IS. The pin serves as a support for a spring 25.

The construction as described thus far was known to the prior art, as exemplified by the patents to Stimpson Number 1,366,034, dated January 18, 1921, and Number 1,838,588, dated December 29, 1931, in which form it has had wide commercial use. In such prior devices, the spring 26 mounted on the pin 25 was connected to an integral part of the cutter blade to produce continuous operation thereof while the loom was functioning.

The instant invention discloses a thread cutting device which will have intermittent operation, and in which the parts are so formed that they can be applied to prior devices of the types disclosed in the cited patents to convert them to intermittently operated temple thread cutters, without changing the basic structural parts of the temple assembly.

Instead of actuating the cutter blade directly by the spring 26, the latter is connected to a bell crank lever 2? which is pivotally mounted for rotary movement on the pin 25 as follows:

One arm 28 of the lever extends downwardly across the path of the lay, in a position approximately parallel to the heel 24 of the cutter blade.

A pin 29 is secured to the arm in a position to extend toward the heel 24, and the latter has a flange 38 formed on it against which the pin may abut under certain conditions, in a manner to be explained subsequently.

The spring 26 has a helically coiled portion 3i embracing the pin 25, and another helically coiled portion 32 embracing the pin 29, and it has an end 33 resting in a support 34 on the temple bar. The bell crank lever is formed with a hole 35 large enough to pass over the coils 3|, which act as a bearing for it. Other spiral coils 36 of the spring serve as a retainer to keep the bell crank lever in position on the pin 25.

This form of spring is shown in Patent No. 1,693,942 to Stimpson, dated December 1923, and is also used in the aforementioned Patent No. 1,838,588. It may be adapted, without modification, to the present device.

The spring is mounted so that it will act on the pin 29 to rotate the bell crank lever in a counterclockwise direction, that is, it will move the arm 28 toward the rear of the loom.

The pin 2S is placed on the forwardly side of the flange 39, and when the bell crank lever is rotated as described above, the pin will contact the flange and cause the cutter blade to be moved rearwardly. When this occurs the cutting edge 20 will be projected beyond the rearmost face of the support It and into a position where it can engage both the filling ends Fl and F2.

In this position the arm 23 of the lever and the heel. 24 of the cutter blade will extend rearwardly beyond the flange l'l. Thus, when the lay reciprocates toward its most forward position it will first contact the parts 24 and 28 and carry them forwardly with it until it abuts the flange l2. During this period the cutting edge 2! will pass along the ledger blade to perform the cutting operation on the filling ends, and the bell crank lever will be rotated in a clockwise direc tion to its original position.

It is apparent that during normal operation both filling ends F-! and F2 will engage the lever 42 but under some conditions either one of the filling ends may become broken. In such a case, the remaining filling end will engage the lever 62 and will condition the parts of the thread cutter for operation by the forwardly moving lay. Thus, it is to be understood that either one or both of the filling ends will operate the lever 39.

When the lay contacts the flange ll it will move the temple structure forwardly as a unit and will generate no further relative motion among the parts. However the force of the lay is applied to the parts very rapidly and the inertia of the elements will cause them to continue to move a slight distance beyond the point where actual contact carries them. As a result of this the cutter blade will finally come to rest with the heel portion 24 forwardly of the longitudinal position of the flange ll. Therefore, on subsequent beats of the lay, if the cutter blade is in this forward position, the lay will not contact the heel and the cutter blade will remain stationary relative to the support It and the ledger blade 2i.

As was noted previously, the cutter blade receives its rearward motion from the bell crank lever 21 by the action of the spring 26 through the interengaging pin 29 and flange 30. This invention provides a means for retaining the bell crank lever in its forward position where it will be unable to actuate the cutter blade unless it is released therefrom by the pressure of filling ends to be cut.

The bell crank lever has a second arm 3l'extending at approximately a right'angle .to' the first arm and disposed along the side face 38 of the support [6. On the same side of the support there is pivotally mounted a second lever 39. The lever 39 may, for convenience, be mounted on the adjusting screw 23.. A collar 40 having a nut 4| formed in the end thereof may be screw threaded on the adjusting screw 23 to provide a bearing for the lever and to afford a means'for locking the adjusting. screw in position.

The second lever 39 has an arm 42 extending downwardly across the arm 31 of the bell crank lever. On the side of the arm 42 facing the support I6 is formed a projection 43 in a position to engage a notch 44 near the end of the arm Bl. The dimensions of the parts are such that the projection 43 will seat itself in the notch'44 when the lever 39 is in a vertical position and the bell crank lever has been carried too near its most forwardly position by the action of the lay.

The rearmost vertical edge of the lever 39 lies approximately in the same plane as the rearmost face 45 of the support It, and in this position it will be contacted by either one or both of the filling ends stretched between the selvage S and thereof will be in a position slightly rearwardly Therefore, when the lay heatsup, it will first contact the arm 28 and move itof the flange ll.

forwardly until the lay abuts'the flange ll. As a result, the bell crank lever will be rotated through a small angle in a clockwise direction,

enough to relieve the pressure on the projection 43 and free the lever 33.

Now if filling ends are pressing against the arm 42, the lever 39 will be rotatedin a clockwise direction and the projection 43 will be un' seated from the notch 44. Under these circumstances, when the lay next reciprocates rearwardly to disengage from the arm 28 and the heel 24, the spring it will rotate the bell crank.

lever 21 in a counterclockwise direction causing the nose of the cutter blade to be projected be-- yond the rearmost face of the support lfiandover the filling ends, which will now reside in the space between the cutting edge 25 and the ledger blade. Hence, when the lay comes forward on the next beat, the filling ends will be severed and drop away from the thread cutter.

.When the lever 39 is forced from the vertical position by the action of the filling ends, the projection 43 will contact the edge 41 of the lever arm 31 and ride along it as the lever 21 is rotated in a counter clockwis direction. The arm 21 is bifurcated, as at 48, to receive the lever 39, thereby permitting the bell crank lever to have sufficient throw in this direction to place the cutter blade in an operative position. The action of the lever is limited by the arm 31 striking the collar 40.

A guidev member 49 for the 'bell crank lever may'be secured to the temple assembly, using the bolt 50 ordinarily employed to hold the temple top inplace. I v

After the filling ends are cut and drop away from contact with the lever 39, it will again assume a vertical position, and the projection 43 will engage the notch 44 to hold the bell crank lever inoperative against the spring 3|.

The complete cycle of the cutting operation, from the time the bell crank lever is released to the time it is again locked in inoperative position, occurs during two reciprocations of the lay, that is, from a forward position to a rearward position, and forwardly again. Hence it will be seen that the action normally is very rapid. However if the device fails to cut the filling ends when first set in motion, it will continue'to operate until the filling ends are cut.

The flange 30 'on' the heel of the cutter blade is formed so that there will be a slight clearance between it and the pin 29 When the bell crank lever is locked in'the forward position. Therefore the movement of the lever, when in this position, produced by the action of the lay, will be unable to cause the blade to be moved. As pre viously explained the heel 24 of the blade also will be in a position forwardly of the flange l1, and hence will not contact the lay. Furthermore the blade will be restrained from free movement by the binding action of the bearing plate 22 and the ledger blade 2|. Thus it follows that when the bell crank lever is locked in the forwardly position, the cutter blade will remain stationary. The cutter blade will be in op-' replenishing loom, a temple supporting member located close to the selvage of the cloth, a temple thread cutter blade mounted therein for movement from an inoperativeto anoperative posi tion, a spring actuated lever mounted'on said supporting member and engaging said cutter blade for moving it to an'operative position, and means normally holding the said lever inactive with the cutter blade in an inoperative position, said" 2. In a filling end cutter device for a fillingreplenishing loom, a temple supporting member located close to the selvage of the cloth, a temple thread cutter blade mounted-therein for movement from aninoperative to an operative position, a spring actuated lever pivotally mounted on said supporting member and engaging said cutter bladefor moving it to an operative position, and means mounted on said supporting member and positioned to engagesaid lever normally to hold said lever inactive with the cutter blade in an inoperative position, said means being constructed and arranged to be actuated by an incoming filling end and an outgoing filling end to release said lever from the inactive position, whereby said lever will place the cutter blade in an operative position.

3. In a selvage trimming device for a filling replenishing loom having a lay reciprocating between a forwardly and a rearwardly position, a

supporting member having a cutter blade slidably mounted therein for movement forwardly and rearwardly of the loom, a spring actuated lever positioned to engage said cutter blade for imparting motion thereto in a rearward direction, said cutter blade being moved in a forward direction by engagement with the lay, and a looking means for holding said lever in an inactive position where it will be ineifective to move said blade, said locking means being constructed and arranged to be actuated by an incoming filling end and an outgoing filling end to release said lever to move said blade into a position where it will be operable to out said filling ends, said locking means functioning to lock said lever in an inactive position after the said filling ends are cut.

4. In a selvage trimming device for a filling replenishing loom having a lay reciprocating between a forward and a rearward position, a supporting member having a cutter blade mounted therein for movement from an inoperative to an operative position, a lever pivotally mounted on said supporting member and having a part de tachably engaging said cutter blade, a spring for actuating said lever for moving said cutter blade to an operative position, said lever and said blade having parts engageable by the lay to move said cutter blade to an inoperative position, and locking means operatively mounted on said supporting member to hold said lever out of engagement with said cutter blade when the cutter blade is in an inoperative position, said locking means being constructed and arranged to be actuated by an incoming filling end and an outgoing filling end to release said lever to engage said cutter blade and place it in an operative position to out said filling ends, said locking means functioning to hold said lever in an inoperative position after the filling ends are cut.

5. In an intermittent temple thread cutter for a loom having a lay reciprocating between a forward and a rearward position, a, supporting member, a cutter blade mounted therein for movement from a forward to a, rearward operative position, a bell crank lever pivotally mounted on said supporting member for rotation from a forward to a rearward position and having a portion thereof abutting said cutter blade, a spring connected to said bell crank lever for moving said lever and said cutter blade in a rearward direction, said lever and said cutter blad having parts engageable by the lay for imparting movement thereto in a forward direction, and locking means mounted on said supporting member normall to lock said bell crank lever in a forward position, said locking means being constructed and arranged to be actuated by an incoming filling end and an outgoing filling end to release said bell crank lever from the locked position to thereby move the cutter blade rearwardly into an operative position to cut the said filling ends.

6. In an intermittent temple thread cutter, a supporting member having a cutter blade operatively mounted therein, an actuating means for the cutter blade comprising a bell crank lever r0 tatably mounted on said supporting member and having on lever portion extending adjacent a portion of said blade and another lever portion extending horizontally along the side of the supporting member, the first said lever portion having a projection formed thereon extending toward and detachably engaging said cutter blade, a spring for biasing said bell crank lever for rotation in a direction to cause the said cutter blade to be projected rearwardly to an operative position through the interaction of the said engaging parts, a second lever pivoted to said supporting member adjacent the rearward end of said bell crank lever and positioned t engage and hold said bell crank lever against the rotative action of the spring to cause said cutting blade to remain in an inoperative position, said second lever being constructed and arranged to be actuated by an incoming filling end and an outgoing filling end to release said bell crank lever to place said cutter blade in an operative position to out said filling ends, said second lever functioning to reengage the bell crank lever after the filling ends are cut.

7. In a selvage trimming device for a filling replenishing loom having a lay reciprocating between a forward and a rearward position, a supporting member, a cutter blade slidably mounted therein for movement from a forward to a rearward position, a bell crank lever pivotally mounted on one side of said supporting member for rotation from a forward to a rearward position, said lever and said blade having depending portions thereon extending into the path of the lay, said depending portion of said lever having a pin pro- 7 jecting therefrom and detachabl engaging said depending portion of said blade, a spring connected to said lever for causing rotation thereof in a direction to impart rearward motion to said blade, said lever and said blade 'being returned to a forward position by the action of the lay on said depending portions thereof, said bell crank lever having another portion extending in a rearward direction, a second lever pivotally mounted on the side of the supporting member and adjacent the rearward end of the said other portion of the bell crank lever, said second lever having a projecting part positioned to engage a notch in the rearwardly extending portion of the bell crank lever when the said lever is rotated by the lay to the most forward position, the said second lever functioning as a locking means to hold the said bell crank lever in its most forward position to thereby prevent it from moving the cutting blade rearwardly, said second lever being constructed and arranged to be actuated by an incoming filling end and an outgoing filling end to release said bell crank lever to place said cutting blade rearwardly in an operative position to out said filling ends, said second lever functioning to lock said bell crank lever in a forward position when sairLfillin-g ends are cut.

JAMES E. 

